Ableton Live - 9.0 Bedienungsanleitung PDF herunterladen (Seite 291)

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291 Live Audio Effect Reference

Lower Release values cause the envelope to respond more quickly to falling input signals. Higher

values extend the envelope’s decay.

Normally, the signal being ﬁltered and the input source that triggers the envelope follower are

the same signal. But by using sidechaining, it is possible to ﬁlter a signal based on the envelope

of another signal. To access the Sidechain parameters, unfold the Auto Filter window by tog-

gling the button in its title bar.

Enabling this section with the Sidechain button allows you to select another track from the choos-

ers below. This causes the selected track’s signal to trigger the ﬁlter’s envelope follower, instead

of the signal that is actually being ﬁltered.

The Gain knob adjusts the level of the external sidechain’s input, while the Dry/Wet knob allows

you to use a combination of sidechain and original signal as the envelope follower’s trigger.

With Dry/Wet at 100%, the envelope follower tracks the sidechain source exclusively. At 0%,

the sidechain is effectively bypassed. Note that increasing the gain does not increase the volume

of the source signal in the mix. The sidechain audio is only a trigger for the envelope follower

and is never actually heard.

The Auto Filter also contains a Low Frequency Oscillator to modulate ﬁlter frequency in a peri-

odic fashion. The respective Amount control sets how much the LFO affects the ﬁlter. This can be

used in conjunction with or instead of the envelope follower.

The Rate control speciﬁes the LFO speed. It can be set in terms of hertz, or synced to the song

tempo, allowing for controlled rhythmic ﬁltering.

Available LFO waveform shapes are sine (creates smooth modulations with rounded peaks and

valleys), square, triangle, sawtooth up, sawtooth down, and sample and hold (generates ran-

dom positive and negative modulation values) in mono and stereo.

There are two LFOs, one for each stereo channel. The Phase and Offset controls deﬁne the rela-

tionship between these two LFOs.

Phase keeps both LFOs at the same frequency, but can set the two LFO waveforms ”out of

phase” with each other, creating stereo movement. Set to ”180”, the LFO outputs are 180 de-

grees apart, so that when one LFO reaches its peak, the other is at its minimum.

Spin detunes the two LFO speeds relative to each other. Each stereo channel is modulated at a

different frequency, as determined by the Spin amount.

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